Electric switch



Apri124, 1928. 1,667,293

I J. R. MARSHALL ELECTRIC SWITCH Filed June 5, 19 -5 l L -a:

Fig.2

f/ fln/ .Patented Apr. 24, 1928.

UNITED STATES PATENT OFFICE.

JOHN'R. MARSHALL; OF IMOKEAN, PENNSYLVANIA.

ELECTRIC SWITCH.

Application filed me 5, 1925.-seria1 No. 35,094.

' This invention is designed to provide an out-door switch for electric wires, or conduits, the purpose of the switch ordinarily being to break the connection when it is desired to make repairs or for other pur poses rather than for normal use. In carry ing out the invention I prefer to connect the ends of the wires that these ends are properly insulated when the switch is open Jut Wlll not break the 11106113111081 connection of the conductor. Features and details of the invention will appear from the I 2 a central vertical section of the ded in insulating blocks 4 which may be of glass porcelain, or similar material.

. Theinsulating block is inclined from a central peak so as to readily shed water and prevent the bridging of the conductors through a water connection and is provided with an annular groove 5 in which is arranged a 1 G-llfO1ClI]g wire 6. The block is 7 and also provided with vertical openings the wire as it is carried from the loop is swung over the conductor at 8 and the end drawn through the opening 7 and returned and wound at 9 on the conductor. It will be seen. therefore, that the wire loop formed through the opening 7 prevents a falling of the conductor wires with any-breakage ()l damage to the post or breaking of thein sulating block because the re-en'lorcing wire (3 forms a complete annulus through the loops formed in the wire through the openings 7 and consequently forms a continuous wire linkage.

A switch plate 10 has a perforation 11 which is mounted on one post and a slot 12 which engages the other post. Metallic 1 shows a perspective view of the These connuts 13 are screwed onthe post and clamp theswitch plate 10011. the loops 20f the conductor wires, the clamping washers 14 being provided at the top of the insulating block to receive the thrust. I prefer to cover the nuts 13 with an insulating shell 15 such as rubber so that they may be more safely handled in opening or closing the switch. When it is desired to open the switch the nuts 13 are loosened and the plate 10 swung clear. The nut at the pivot may then be slightly tightened so as to prevent the accidental closingof the switch.

In order to prevent a bridging across of water should the conductors be slightly in clined I preferably provide a cross groove 16 on" the underside of the insulating block which forms" a drip edge and prevents the continuous flow of water across the bottom. IVhatI claim as new is I 1. In an electric: switclnthe combination of an insulating block having perforations therethrough' and a surrounding re-enforeing wire; conductors looped through the perforations and insulated from the sur-' rounding wire said conductors supporting the block; and a switch plate detaehably connecting said conductors.

2. In an electric switch, the combination of two conductor postsyan insulating base in which the posts are mounted; conductors leading to the posts and supporting the base; a surrounding re-enforcing Wire on the insulating base insulated from the conductors; and a conductor switch plate between the posts and detachable from one of the posts.

In an elcctrieswitch, the combination ,of an insulating block; conductors lear'ling to each end of the block; and a switch-connection between the conductors theinsulating block being lncllned at its top with a )eak between the conductors and havin a a drip groove in its. bottom surface opposite to and in line with the peak.

In testimony whereof I have hereunto set my hand.

JOHN R. MARSHALL; 

